Find the length of a cuboid, if its total surface area is 166 cm² and its breadth and height are 4 cm and 7 cm respectively
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Answer:
5cm
Step-by-step explanation:
total surface area=166cm², breadth=4cm, height=7cm, length=?
T.S.A=2(lb+bh+lh)
166=2(l*4 + 4*7 + l*7)
166=2(4l + 28 + 7l)
166=2(11l + 28)
83=11l + 28
11l=83-28
11l=55
l=55/11
l=5
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